Answer:
B. The student chose the correct tile, but needs to flip the tile to make the units cancel
Explanation:
Based on the reaction:
2AgNO₃(aq) + Cu(s) → 2Ag(s) + Cu(NO₃)₂ (aq)
<em>2 moles of AgNO₃ react per mole of Cu producing 2 moles of Ag and 1 mole of Cu(NO₃)₂</em>
Thus, if you want to produce 6.75moles of Cu(NO₃)₂ you need:
 = 13.50 moles of AgNO₃ are needed
 = 13.50 moles of AgNO₃ are needed
Thus, if you analize the tile shown by the student:
<em>B. The student chose the correct tile, but needs to flip the tile to make the units cancel</em>
 
        
             
        
        
        
Hey there,
Answer:
4 valence electrons.
Hope this helps :D
<em>~Top☺</em>
        
             
        
        
        
55= No (1/2)^55/57
55= No (1/2)^3.9 
55= No (1/2)^4
55= No (1/16)
No= 880 g
        
                    
             
        
        
        
Answer:
1,085g of water
Explanation:
If we have the value 4520kj is because the question is related to Energy and heat capacity. In this case, the law and equation that we use is the following: 
                                                   Q= m*C*Δt  where; 
Q in the heat, in this case: 4520kj
m is the mas
Δt= is the difference between final-initial temperature (change of temperature), in this exercise we don´t have temperatura change.
In order to determine the mass, I will have the same equation but finding m
                                           m= Q/C*Δt    without   m=Q/C
So: m= 4,520J/4.18J/g°C
       m= 1,0813 g